Treating pitch



Patented @ct. 2d, 1%22.

attain rerun-r cruise.

FREDEJEICK JAMEfi COMMTN, GE LUNDQH, ENG-LAND.

TREATING PITGEI.

' lilo Drawing.

i To aZZ whom it may concern Be it known that l, Fnnnnmon JAMES COMMIN, a subject of the King of Great Britain and Ireland, residing at London, En land, have invented certain new and use 111 Improvements in Treating Pitch, of which the following is a specification.

The object of this inventlon is the production of a itch in an extremely fine state of division.

The invention consists in inding the pitch inthe presence of a solutlon of a pep tonizing agent in order that) it can be obtained in a very finely divided state in which form it can be readily and uniformly distributed with other materials in the presence of a suitable liquid.

Suitable peptonizing agents are: casein dissolved in a dilute solution of alkali or a solution of sodium rosinatein water.

When the pitch is ground in the presence of these substances, the fine particles produced are prevented from adhering together again or are deflocculated and the resulting product can be readily dispersed in water. The fine particles only deposit very slowly or not at all and are in a semi colloidal state.

, According to onemode of carryin out the invention the coarsely ground pi ch is treated in a ball mill with an amount or water equal in weight to the pitch taken, and which is dissolved resin soap, the latter acting as a peptonizing agent. The amount of peptonizing agent taken should be approximately equal to 2% of the weight or the pitch. The whole is ground in the mill till the desired degree of dispersion is obtained, say from one to six hours,

@ne application of the invention is in the manufacture of cellulose fibre compositions of which pitch, in a very finely divided state and uniformly distributed, forms one of the components, the peptonized or defiocculated pitch being added to a cellulose pulp, The eiifect of the mixing of the pep-= tonized pitch with the cellulose fibre is to withdraw the former -from its state of semi solution in the water which can be drained away substantially free from pitch.

in the resulting composition the pitch, in a very finely divided state, is uniformly distributed in a manner hitherto impossible or extremely difficult to obtain.

it claim:

1. The method of treating pitch to bring Application filed December 27, 1920. Serial Ito. 433,436.

it into an extremely fine state of division, consisting in grinding the pitch in a solution of a peptonizing agent, with said solutlon is sufiicient quantity to produce a resultant mass of liquid consistency in the nature of a pitch cream.

2. The method of treating pitch to bring 1t into an extremely fine state or" division, consisting in grinding the itch in a solution of resinous material, with said solution in suiiicient quantity to produce a resultant mass of liqmd consistency in the nature of a pitch cream.

3. The method of treating pitch to bring it into an extremal fine state of division, consisting in grinding the pitch in a solu tion of a resin soap, with said solution in sufiicient quantity to produce a resultant mass of liquid consistency in the nature of a pitch cream.

l. The method of treating pitch to bring it into an extremely fine state of division,

consisting in grinding the pitch in a solu= tion of a sodium rosinate in water, with said solution in suilicient quantity to produce a resultant mass of liquid consistency in the nature of a pitch cream.

5. The method of treating pitch to bring it into an extremely finely divided state, 0011- sisting in subjecting coarsely ground pitch to a grinding action in a ball mill, in a solu tion or a peptonizing agent, with such solution in sufficient quantity to produce a resultant mass of liquid consistency in the nature of a pitch cream.

6, The method of treating pitch to bring it into an extremelyfinely divided state, consisting in subjecting coarsely ground pitch with water in which a peptonlzingagent is dissolved to a grinding action in a ball mill, with the water solution of the peptonizing agent in suficient quantity to produce a re sultant mass of liquid consistency in the no ture of a cream.

7. A method of treating pitch to loring t into an extremely finely divided state cortsisting in subjecting coarsely ground pitch to a grinding action in a ball mill with water solution of a peptonizing agent, the amount of water being equal in weight to the pitch, and the amount of peptonizing agent being equal in weight approximately to two per cent of the weight of the pitch.

8. A. method of obtaining pitch in an extremely fine state of division consisting in treating coarsely ground pitch in a ball mill with an amount of Water equal in Weight to grinding pitch in the presence of a solution the pitch, having dissolved therein a resin of a peptonizing agent the fine particles besoap in amount equal approximately to two ing deflocculated and in a semi colloidal 10 per cent of the Weight of the pitch, the ball state.

5 mill treatment being continued until the de In testimony whereof I have signed my sired degree of dispersion is obtained. name to this s ecification.

9. A finely divided pitch obtained by F RE'DE ICK JAMES COMMIN. 

